Loading the file in java code using WEKA's library throws java.lang.ClassCastException
maniek.rm Sep 11, 2016 5:27 AMHi,
I use a Wildfly 10 and a WEKA 3.8 in my Java EE project. I'm trying to load a CSV file in java code for the WEKA by means of the WEKA's library (based on http://weka.wikispaces.com/Use+Weka+in+your+Java+code article, chapter `3.5.5 and newer`):
import weka.core.converters.ConverterUtils.DataSource; .... DataSource source=new DataSource(pathFile.toString()); ...
Unfortunately, the above code throws this exception:
Problem with 'weka.filters.UnsupervisedFilter': java.lang.ClassCastException: org.jboss.modules.ModuleClassLoader cannot be cast to java.net.URLClassLoader
Do you have any idea what can I do to fix this issue? Could it be a Wildfly bug?
Full stacktrace:
10:33:04,226 INFO [stdout] (default task-29) Problem with 'weka.filters.UnsupervisedFilter': java.lang.ClassCastException: org.jboss.modules.ModuleClassLoader cannot be cast to java.net.URLClassLoader 10:33:04,227 INFO [stdout] (default task-29) Problem with 'weka.filters.UnsupervisedFilter': java.lang.ClassCastException: org.jboss.modules.ModuleClassLoader cannot be cast to java.net.URLClassLoader 10:33:04,228 INFO [stdout] (default task-29) Problem with 'weka.classifiers.IterativeClassifier': java.lang.ClassCastException: org.jboss.modules.ModuleClassLoader cannot be cast to java.net.URLClassLoader 10:33:04,228 INFO [stdout] (default task-29) Problem with 'weka.classifiers.IterativeClassifier': java.lang.ClassCastException: org.jboss.modules.ModuleClassLoader cannot be cast to java.net.URLClassLoader 10:33:04,228 INFO [stdout] (default task-29) Problem with 'weka.experiment.Tester': java.lang.ClassCastException: org.jboss.modules.ModuleClassLoader cannot be cast to java.net.URLClassLoader // OTHER EXCETIONS [Problem with 'weka.*': java.lang.ClassCastException: org.jboss.modules.ModuleClassLoader cannot be cast to java.net.URLClassLoader] 10:33:04,427 WARNING [javax.enterprise.resource.webcontainer.jsf.lifecycle] (default task-29) #{dataAnalysisController.load()}: java.lang.ExceptionInInitializerError: javax.faces.FacesException: #{dataAnalysisController.load()}: java.lang.ExceptionInInitializerError at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118) at javax.faces.component.UICommand.broadcast(UICommand.java:315) at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790) at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282) at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:658) at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85) at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62) at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36) at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131) at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46) at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64) at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60) at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77) at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50) at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43) at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284) at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:263) at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81) at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:174) at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202) at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:793) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) Caused by: javax.faces.el.EvaluationException: java.lang.ExceptionInInitializerError at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101) at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102) ... 34 more Caused by: java.lang.ExceptionInInitializerError at weka.core.converters.ConverterUtils.initialize(ConverterUtils.java:772) at weka.core.converters.ConverterUtils.<clinit>(ConverterUtils.java:728) at weka.core.converters.ConverterUtils$DataSource.<init>(ConverterUtils.java:126) at com.system.analysis.LearningMachine.load(LearningMachine.java:34) at com.system.analysis.DataMining.saveToFileMethod1(DataMining.java:284) at com.system.analysis.DataMining.getMethod1(DataMining.java:113) at com.system.analysis.DataTableWectorsMethod1Class.load(DataTableWectorsMethod1Class.java:45) at com.system.controller.DataAnalysisController.load(DataAnalysisController.java:134) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at javax.el.ELUtil.invokeMethod(ELUtil.java:308) at javax.el.BeanELResolver.invoke(BeanELResolver.java:415) at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:256) at com.sun.el.parser.AstValue.invoke(AstValue.java:285) at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304) at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40) at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40) at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50) at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105) at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87) ... 35 more Caused by: java.awt.HeadlessException at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:204) at java.awt.Window.<init>(Window.java:536) at java.awt.Frame.<init>(Frame.java:420) at java.awt.Frame.<init>(Frame.java:385) at javax.swing.SwingUtilities$SharedOwnerFrame.<init>(SwingUtilities.java:1758) at javax.swing.SwingUtilities.getSharedOwnerFrame(SwingUtilities.java:1833) at javax.swing.JOptionPane.getRootFrame(JOptionPane.java:1696) at javax.swing.JOptionPane.showOptionDialog(JOptionPane.java:863) at javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:666) at javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:637) at weka.gui.GenericObjectEditor.determineClasses(GenericObjectEditor.java:242) at weka.gui.GenericObjectEditor.<clinit>(GenericObjectEditor.java:257) ... 58 more